Tracker-bar for piano-players.



PATENTED NOV. 26, 1907 F. W. WOOD. TRACKER BAR FOR PIANO PLAYERS.

APPLICATION FILED DEO.14, 1906.

[am/Mar 'mrmm ma. I

L717!) /F 246. a!

. STATES .-1 OFFiCE.

v. FREDERICK w. WOOD; F Kansas CITY, mssoun lssreiqon 'ro eannr woon "time PI'AYER'OQ, or cm, mssormr' 1 I No. 872,816;

mean-ran roams-runes.

To all em a: may Be'it known'that I, Fnnnnmen W-. Woon,

acitizen of the United States, residing,;at

Kansas City, in the county of Jackson and State of-Missouri, have invented certain new and useful Improvements in Tracker-Bars .acterha' novel .and pecuhal" features of con- .struction as specification. 4 I

' This invention relates to tracker bars for neumatically played ins r ments, and has or its object lemental tubes and the ne sheet said 83p adap to travel over'the tracker bar.

A further objectis to produce a'device' of simple, durable "and indirectly, Zlateral movement of the note this character of 've construction.

To theseends the invention consists-in claimed; and in oer it may be fullyunderstoodreferenceistobehadtotheaccompan' drawing,inwhich-;

v 1, iia side view of a tracker bar uip wit "my improvement, a portion fimfi,

the improvements thereon and the note sheet, being shown in vertical section.

' that the supplemental invention whereby -ment constitu out of-its direct 2, is.a similar vi w except that the improvements are in du ]icate',-one-be1ng lo-T bar and each pro an end view of the -bar. 4, is a viewpf part ofthe attachmy improvement;

' 'th a detailed descripdesirable to'state v be! m. i

conditiomi to conduct detail Before p tion of the invention it der certain certain forming no part latera'lly'in one direction o as other path is caused to reverse such shifting movement, the result being that the note'sheet is compelled tn travel is prede co r w a gp p y-w h e W 1 4 5 a now to-the drawing, 1 indicates a tracker of any suitable or preferred' type and 2 the-note sheet extending'transverselythereoverintheusualmanner,the orations.(not own) of th'enote sheetbe- .1withtheproperh'acker to produce a device o f'this'charsupplemental tubes and dju t.- able means or varyingthe relation between said e the other.

the note onsaid 0 the note-sheet Ifboth supplemental opene o s- 2, .ing'of air to enter such openings and passlthrough flexible tubes 4, for a urpose not'nemston'amelherein, In. l the tracker,

in its upper side and one endbar is provide with a longitudinally inverted-T shaped by tical: slot .6 7 connected preference with an o r r municating with the ower end of said slot, f

8 a slide .of proper form to extending groove 5: of

to said groove andgbyvi witliapa rofo ,orp l a of tubgsdlo '-o mugs an epen y erence slot 6, the-lower ends of i213 .10 being y sheet on tracker-bar in one direction or v th 'eon truction'shown in 1 the note sheetby preference normally "covers the-inner-o mngjor V uncovered I companion opening or as the notesheet mainleaves properly. Should it to theright, "however,

means .herembeqq ties shit it bac again to the'-right.- J:

Fig. '2, which'illustratesra' slide at end of bar aiid s'aid slide' 'as' equip with. a single-supplemental opening, t e note sheet is shown as termm' justinward of said o therefore correspond in function to the outeropening 9 of 1. It desired both openings 9 of any correspond to the inner o '9 o pening should -be,- normally covered by correspond outer openand of them thi actionres'ults,

covers one I J the instrumentalities referred to, m

in the'oppositedirection. both an lemental Fig.2 should correspond, to the inner o w of Fig. 1, andthenotesheetshiit'tothe tortothe left and therefore uncover the aft hand or preference, with a ver-::

fit an" [and slidingly'in groove and pro- 1 relation describedit isj new. so,

normally uncovered sup- Y no psrtlofthe n-i penings, both of whic a l, in which bothof the newsheet shifts aid 'zo flexibletubes 11 which lead to mstrumentalities for efiecting directly or the-fight jhand supplemental opening, re- 119 spectively, the result will be that the note sheet will be shifted back to its original position. My preferred means for eflectin the shifting of the note-sheet are describe and illustrated in an application now pending in the U. S. Patent Oflioe, which application also shows and describes slides of the character embodied in this application which,

' therefore, is confined as regards its claims, to

the specific construction of the slide or slides and the means whereby each slide isadjusted longitudinally-of the tracker bar for the purpose of accommodating the note sheet in case its width varies under expansion or contraction or by reason of its edges being curled ordoubled back upon the body of the sheet. The slide is provided at its outer end with a groove 12 of -T-shape in cross section, the stem-portion of the groove opening out through the end of neck 13 0f the set screw 14, the inner end of The screw is mounted in the screw being-provided with a head 15 oocupying the head of the T-shaped groove. a screw seat in the bracket 16 secured to or formed rigidly with the support 17. be seenthat the screw bears a swivel relation with respect to the slide, so'that when it is turned in one direction or the other it effects longitudinal adjustment of the slide inward or outward and thus changes the relation of t the supplemental opening or openings of the tracker bar with respect to the note sheet. 7

From the above description it will be apparent that I have produced a tracker bar for pneumatically played instruments possessing the features of advantage enumerated and I wish it to be understood that I do the block to receive'the From the foregoing itwill' not desire to be restricted to the exact details of construction shown and described as obvious modifications will suggest themselves t o one skilled in the art.

Having thus described the invention what I I claim as new and desire ters Patent is 1. In a device of the character described, a

to secure by Lettracker bar provided with a longitudinal se- 7 ries of air ducts and with an opening at one end of said series, ablock fitting in said opening and having one of its faces flush with and forming practically a continuation of the face of the tracker bar; said block having a passage eXtendi-n through-"it from-said face, and means to a' just said block longitudinally in the opening ofthe tracker =bar'so as to vary the distance between the mouth ofpassage and the series of tracker bar air.

said block to ad'ust the same longitudinally and thus vary t e distance between its passage and the longitudinal series of tracker bar air ducts.

In testimony whereof 'I aflix my signature, in the presence of two witnesses.

- FREDERIOH W. WOOD.

Witnesses:

FRA'N'K- R. -GLORE'}. G. -1 -TH0RPE. 

